Hawai'i's number of possible cases of the mystery respiratory illness from Asia dropped to four today after laboratory tests indicated another source for one woman's illness, according to state health officials.

Dr. Linda Rosen, deputy health director, said that one of the two O'ahu women who had traveled with a tour group to China has been dropped.

As of today, the federal Centers for Disease Control and Prevention had received 100 reports of suspected cases of severe acute respiratory syndrome, or SARS, in the United States from 28 states, with no deaths and only 23 percent of those patients reporting pneumonia.